1/4 x 26 (TPI) BSC. - 1 x 6.7mm drill bit. Creates a stronger internal thread in soft materials.
5/16” x 26 BSC Thread Repair Cutter Kit Helicoil Set for Damaged Threads 14pc
1/2” x 26 BSC Thread Repair Cutter Kit Helicoil Set for Damaged Threads 14pc
3/8" x 26 BSC Thread Tap Repair Cutter Kit Helicoil Damaged Threads 14pc Kit
1/4 x 26 BSC Thread Repair Cutter Kit Helicoil Set for Damaged Threads 14pc
